Abstract
Aiming to the problem of free face not only affect the blasting effects but also the blasting vibration affects, an analytical method of exploring the free face’ influences of the blasting vibration and the attenuation law of seismic wave is proposed. Taking the field monitoring data of underwater blasting seismic wave between the river reach of the Three Gorges Dam and Gezhouba Dam as the study object, utilize the wavelet analysis and decompose method to research the blasting vibration signal’s total energy and energy distribution characteristics in variety of frequency band on different free face. The results indicated that underwater drilling blasting vibration has the characteristic of low frequency, short duration and fast attenuation. Most of the energy of the explosion will be consumed as seismic energy in the slotted blasting due to the restricted of a single free face. However, after the subsequent excavation blasting, the free face number increases but the total energy of blasting vibration and PPV decreases. Therefore, in addition to the usual seismic mitigation measures of underwater drilling and blasting, the number of free faces can be increased to achieve the effect of shock absorption control without reducing section charge.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Earth and Environmental Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
